Credit card details sold for less than $1

It costs organised criminals less than $1 to buy a person's credit card details allowing them to fleece millions of dollars from accounts, the Australian Crime Commission (ACC) says.

Credit card information was the most commonly sold item in the underground economy in 2009, according to the ACC's Warren Gray.

Since then, the number of online frauds involving Australian-issued cards has nearly doubled.

And so has the amount of money fleeced - from almost $90 million in 2009 to $197 million last year.

Most offences were committed overseas.

Launching a new education program to help Australian businesses combat online fraud, Mr Gray said organised criminal groups had gone beyond using card skimmers and were now increasingly hacking computer systems to steal information.

"Stolen card data, including credit card numbers, can be purchased for less than one dollar each if purchased in bulk," he said in Sydney on Wednesday.